Re-add the CloudSync functionality

It got removed in the marketplace upgrade.

CURA-9146

plugins/Marketplace/CloudSync/LicenseModel.py

@@ -0,0 +1,77 @@
+from PyQt6.QtCore import QObject, pyqtProperty, pyqtSignal
+from UM.i18n import i18nCatalog
+
+catalog = i18nCatalog("cura")
+
+
+# Model for the ToolboxLicenseDialog
+class LicenseModel(QObject):
+    DEFAULT_DECLINE_BUTTON_TEXT = catalog.i18nc("@button", "Decline")
+    ACCEPT_BUTTON_TEXT = catalog.i18nc("@button", "Agree")
+
+    dialogTitleChanged = pyqtSignal()
+    packageNameChanged = pyqtSignal()
+    licenseTextChanged = pyqtSignal()
+    iconChanged = pyqtSignal()
+
+    def __init__(self, decline_button_text: str = DEFAULT_DECLINE_BUTTON_TEXT, parent = None) -> None:
+        super().__init__(parent)
+
+        self._current_page_idx = 0
+        self._page_count = 1
+        self._dialogTitle = ""
+        self._license_text = ""
+        self._package_name = ""
+        self._icon_url = ""
+        self._decline_button_text = decline_button_text
+
+    @pyqtProperty(str, constant = True)
+    def acceptButtonText(self):
+        return self.ACCEPT_BUTTON_TEXT
+
+    @pyqtProperty(str, constant = True)
+    def declineButtonText(self):
+        return self._decline_button_text
+
+    @pyqtProperty(str, notify=dialogTitleChanged)
+    def dialogTitle(self) -> str:
+        return self._dialogTitle
+
+    @pyqtProperty(str, notify=packageNameChanged)
+    def packageName(self) -> str:
+        return self._package_name
+
+    def setPackageName(self, name: str) -> None:
+        self._package_name = name
+        self.packageNameChanged.emit()
+
+    @pyqtProperty(str, notify=iconChanged)
+    def iconUrl(self) -> str:
+        return self._icon_url
+
+    def setIconUrl(self, url: str):
+        self._icon_url = url
+        self.iconChanged.emit()
+
+    @pyqtProperty(str, notify=licenseTextChanged)
+    def licenseText(self) -> str:
+        return self._license_text
+
+    def setLicenseText(self, license_text: str) -> None:
+        if self._license_text != license_text:
+            self._license_text = license_text
+            self.licenseTextChanged.emit()
+
+    def setCurrentPageIdx(self, idx: int) -> None:
+        self._current_page_idx = idx
+        self._updateDialogTitle()
+
+    def setPageCount(self, count: int) -> None:
+        self._page_count = count
+        self._updateDialogTitle()
+
+    def _updateDialogTitle(self):
+        self._dialogTitle = catalog.i18nc("@title:window", "Plugin License Agreement")
+        if self._page_count > 1:
+            self._dialogTitle = self._dialogTitle + " ({}/{})".format(self._current_page_idx + 1, self._page_count)
+        self.dialogTitleChanged.emit()